System for control of exhaust gas recirculation

Details System for control of exhaust gas recirculation System for control of exhaust gas recirculation

F - Mech Eng,Light,Heat,Weapons

02

M

123/98.05

F02M 25/06 (2006.01) F02M 25/07 (2006.01)

Patent

CA 1052647

SYSTEM FOR CONTROL OF EXHAUST GAS RECIRCULATION ABSTRACT In an automotive internal combustion engine, metered quantities of exhaust gases are recirculated by way of a control value to the intake manifold of the engine in order to control temperatures within the combustion chambers, thereby reducing formation of oxides or nitrogen. The control or metering valve is actuated by a vacuum motor which may be in the form of a diaphragm and which vacuum motor is actuated by vacuum signals derived from a pair of ports in the carburetor which supplies the air-fuel mixture to the engine. Vacuum signals are picked up at each of the two ports in the carburetor and merged by way of a single conduit to the vacuum motor chamber of the control valve. Location of the ports and calibrated restrictions within the conduits regulate the control of the metering valve.

251648

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